BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 75

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Figure 2-24. Transmit System Bus Waveforms
Figure 2-25. TSB 4.096 MHz Bus Mode Time Slot Interleaving
Figure 2-26. TSB 8.192 MHz Bus Mode Time Slot Interleaving
N8370DSE
NOTE(S):
NOTE(S):
TFSYNC
TFSYNC
TSBCKI
E1
T1
TSBCKI
TPCMI
TPCMI
TSIGI
TSIGI
A and B time slot data comes from different Bt8370s. TSBCKI can be operated at 1 or 2 times the data rate.
A, B, C, and D time slot data comes from different Bt8370s. TSBCKI can be operated at 1 or 2 times the data rate.
TMSYNC
TFSYNC
TSBCKI
TPCMO
TPCMI
TINDO
TINDO
TSIGI
TSIGI
SIG31A
TS31A
X
1
1
X
SIG31A
TS31A
X
2
2
X
Frame 48 TS 31
Frame 48 TS 24
and 8.192. The T1 rate, with 24 time slots and without framing bits, is
1.536 MHz. The T1 rate with framing bits is 1.544 MHz. The E1 rate, with
32 time slots, is 2.048 MHz. The 4.096 MHz rate is twice the E1 rate, with
64 time slots. The 8.192 MHz rate is 4 times the E1 rate, with 128 time slots.
The 4.096 and 8.192 MHz bus modes contain multiple bus members (A, B, C,
and D), of which 1 bus member is selected by the SBI [3:0] bits in the System Bus
Interface Configuration register [SBI_CR; 0D0]. See
The system bus rate is independent of the line rate and must be selected using the
System Bus Interface Configuration register.
SIG31B
TS31B
X
3
3
X
The TSB supports five system bus rates (MHz): 1.536, 1.544, 2.048, 4.096,
X
4
4
X
SIG31C
TS31C
A
5
5
A
SIG31B
B
6
6
B
TS31B
Conexant
SIG31D
C
TS31D
7
7
C
D
8
D
8
X
F
1
X
SIG0A
TS0A
X
2
X
1
SIG0A
TS0A
Frame 1TS 0
Frame 0 TS 1
X
2
3
X
SIG0B
TS0B
X
3
4
X
X
4
5
A
SIG0C
Figures 2-25
TS0C
A
5
6
B
2.0 Circuit Description
2.7 Transmit System Bus
B
SIG0B
6
7
C
TS0B
SIG0D
TS0D
C
7
8
D
and 2-25.
D
8
1
X
X
2
X
1
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